单词 | lactone |
释义 | lactone[ lak-tohn ] / ˈlæk toʊn / noun Chemistry.any of a group of internal esters derived from hydroxy acids. Origin of lactoneFirst recorded in 1840–50; lact- + -one OTHER WORDS FROM lactonelac·ton·ic [lak-ton-ik], /lækˈtɒn ɪk/, adjectiveWords nearby lactonelactogenesis, lactogenic, lactogenic hormone, lactoglobulin, lactometer, lactone, lactonize, lacto-ovo-vegetarian, lactoprotein, lactorrhea, lactoscope Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 British Dictionary definitions for lactonelactone / (ˈlæktəʊn) / nounany of a class of organic compounds formed from hydroxy acids and containing the group -C(CO)OC-, where the carbon atoms are part of a ring Derived forms of lactonelactonic (lækˈtɒnɪk), adjectiveCollins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 Medical definitions for lactonelactone [ lăk′tōn′ ] n.An anhydride formed by the removal of a water molecule from the hydroxyl and carboxyl radicals of hydroxy acids. Other words from lactonelac•ton′ic (-tŏn′ĭk) adj.The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company. Scientific definitions for lactonelactone [ lăk′tōn′ ] Any of various organic esters derived from organic acids by removal of water. Lactones are formed when the carboxyl (COOH) group of the acid reacts with a hydroxyl (OH) group in the same acid, releasing water and causing the carbon atom to join to the hydroxyl's remaining oxygen atom, forming a ring. Vitamin C, the antibiotic erythromycin, and many commercially important substances are lactones. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. |
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